geico. just click away with our free mobile app. >>> we're following the breaking news about the secretary of state hillary clinton. diagnosed as having a blood clot in the brain. situated in the space between the brain and her skull, behind her right ear. her doctors said it was discovered as a result of a routine follow-up mri on sunday. they insist she is making excellent progress. they say we are confident she will make a full recovery. let's bring in our chief medical correspondent dr. sanjay gupta. he's joining us by phone. when i heard, yesterday, that she had a blood clot, i assumed it was in her leg, deep vein thrombosis. maybe some place else. i always assumed it would be much more serious if it was in her head. you're a neurosurgeon. when you read the statement her doctors put out just a little while ago, what did you think? >> yes, i agree with you. it was a little surprising that they didn't just come right out and say that. what i think the most concerning thing was and what pe